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Indoor Device ERV or ERV DX AWHP(Hydro kit) AHU
7 Atypical operation Atypical operation Atypical operation
 
8
   
Hot water
thermometer
malfunction
Operate smoke
control through
smoke detection.
9
EEPROM ERROR
(indoor unit)
EEPROM ERROR
(indoor unit)
EEPROM ERROR
(indoor unit)
 
10
Indoor fan LOCK
(operation error)
Indoor fan Lock
(operation error)
   
11
   
HHU/boiler
communication error
(HHU)
 
12
Indoor mid-pipe sensor
error
 
Boiler error (HHU)
 
13
Heater terminal
block sensor
(A-PAC)
 
Solar heat
temperature sensor
error
Temperature
(ERV, air supply,
external air,
Mix) is outside
acceptable range.
14
   
Indoor unit flow
switch operation
error
Humidity (ERV, air
supply, external
air) is outside
acceptable range
15
O-ROTOR
(BLDC FAN driver)
communication error
 
Water pipe
overheating
CO value is
within acceptable
range
16
   
Simultaneous
AWHP temperature
sensor error
Pressure
(pressure change,
static pressure)
is outside
acceptable range
17
 
ERV DX air out
sensor
Inlet water
temperature sensor
error
Speed (ERV
and air supply
flow) is outside
acceptable range.
18
 
ERV DX air return
sensor
Outlet water
temperature sensor
error
 
19
 
ERV DX Main
PCB Sub PCB
communication error
Elec/Heater outlet
water temperature
sensor error
 
144


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